+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   27763 (1991 RN22) Classification: Main-belt Asteroid          SPK-ID: 2027763 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250478 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2076046 n/a   a 2.2605093 n/a AU q 1.7912172 n/a AU i 4.95695 n/a deg node 10.95651 n/a deg peri 291.38634 n/a deg M 159.80247 n/a deg tp 2455849.4527436 (2011-Oct-14.95274360) n/a JED period 1241.3888990 3.40 n/a n/a d yr n 0.28999776 n/a deg/d Q 2.7298014 n/a AU   Orbit Determination Parameters    # obs. used (total)      423      first obs. used      1991-??-??      last obs. used      2013-01-18      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.587  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.0 mag n/a PDS3 (MPO 15157)   27763 (1991 RN22)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675) Reference: 20010902/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RN22 = 1998 UL31  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 21:33 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin